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Finding the Fourth Proportional to 348,748, 523,126.86 and 99,430

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Solution

The fourth proportional to 348,748, 523,126.86 and 99,430 is: 149,146.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,748 : 523,126.86 = 99,430 : x
  2. Step 2: Convert to fraction form
    348,748/523,126.86 = 99,430/x
  3. Step 3: Cross multiply
    348,748x = 523,126.86 × 99,430
  4. Step 4: Simplify right side
    348,748x = 52,014,503,689.80
  5. Step 5: Solve for x
    x = 52,014,503,689.80/348,748
  6. Step 6: Final answer
    x = 149,146.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.